Lamp



FIG. 1 is a front perspective view of a lamp showing our new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a left elevational side view thereof;

FIG. 5 is a bottom plan view thereof; and

FIG. 6 is a top plan view thereof; 

The ornamental design for a lamp, as shown and described. 